skip value in for loop if it = 0 c#

Question

how to skip writing the value to the file if it = 0 in my calculator program

Procedure that writes the array into a file

 public void SaveArrayToFile()

        {
            int count;
            var writer = new System.IO.StreamWriter("C:/calc/calculations.txt",false);
            for (count = 0; count <= Results.Length -1 ; count++)
            {
                if (Results[count] == 0)
                {
                    // problem
                }
                writer.Write(Results[count]);
                writer.WriteLine();
            }
            writer.Dispose();

Any help would be valued

Use else, if your loop has a large body continues will make it unreadable — Sten Petrov
– Sten Petrov, Commented Apr 15, 2013 at 17:19
What do you want it to do if Results[count] == 0? Should it write an empty row to the file? Should it write a special value that means 'no data present'? Should it skip the row entirely? Skipping the row entirely is easy with the continue keyword, but if these results need to be read in by another program, that may not work. — David Yaw
– David Yaw, Commented Apr 15, 2013 at 17:20
Instead of saying writer.Dispose(); in the end, you should use a using statement: using (var writer = new StreamWriter("C:/calc/calculations.txt", false)) { for ... }. — Jeppe Stig Nielsen
– Jeppe Stig Nielsen, Commented Apr 15, 2013 at 17:32

Ben Voigt · Accepted Answer · 2013-04-15 17:18:45Z

12

Either

if (Results[count] == 0)
{
    continue;
}
writer.WriteLine(Results[count]);

or even simpler

if (Results[count] != 0)
{
    writer.WriteLine(Results[count]);
}

answered Apr 15, 2013 at 17:18

Ben Voigt

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1 Comment

06needhamt Over a year ago

Thanks exactly what i needed i didn't know about continue

p.s.w.g · Accepted Answer · 2013-04-15 17:32:35Z

6

That's exactly what the continue statement is for.

if (Results[count] == 0)
{
    continue;
}

You could also solve this problem using Linq:

foreach (var result in Results.Where(r => r != 0))
{
    writer.Write(result);
    writer.WriteLine();
}

edited Apr 15, 2013 at 17:32

answered Apr 15, 2013 at 17:18

p.s.w.g

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Comments

djs · Accepted Answer · 2013-04-15 17:20:11Z

5

if (Results[count] != 0)
{
  writer.Write(Results[count]);
  writer.WriteLine();
}

answered Apr 15, 2013 at 17:20

djs

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Comments

Hossein Narimani Rad · Accepted Answer · 2013-04-15 17:25:28Z

4

Use the continue

//your code

if (Results[count] == 0)
{
    continue;
}

//your code

More (Jump Statement):

To terminate the loop use the break keyword.
To escape the current iteration use continue

edited Apr 15, 2013 at 17:25

answered Apr 15, 2013 at 17:18

Hossein Narimani Rad

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Comments

Moondustt · Accepted Answer · 2013-04-15 17:20:14Z

3

simply:

if (Results[count] != 0)
{
       // Write it.
}

answered Apr 15, 2013 at 17:20

Moondustt

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